| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | den | Europe | In some European countries, dens may be associated with traditional hunting lodges or the lairs of wild animals, emphasizing a rugged and outdoorsy image. | 1 |
| 2 | douglas dc 3 | Europe | Historical significance as an iconic aircraft in the development of aviation. | 1 |